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Batra Trading Company
Batra Trading Company


Ultrasonic Labortary Instruments

Pioneers in the industry, we offer ultrasonic diffraction apparatus, fourier analysis kit, verdet's constant appratus farradays effect, ultrasonic waves velocity in a liquid medium, digital rf oscillator and curie temperature kit from India.

Ultrasonic Diffraction Apparatus

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Ultrasonic Diffraction Apparatus
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Approx. Rs 21,500 / Piece(s)Get Latest Price

The instrument is designed to give accurate and best result, keeping inview the various difficulties faced by the students. A high Power R.F.Oscillator is designed for this experiment and special type of high Resolving Spectrometer with Micrometer Eye-piece is provided for this experiment. It is fully tested & more fringes are formed with the help ofR.F. Oscillator. Direct measurement can be made on the micrometereye-piece and no camera is required.

High Power R.F. Oscillator Specification Input : 230 volts AC 50c/sFrequency : 2.5-6.5Mc/s calibrated for different set ofcrystal Freq. & is Continuously variable R.F. Output : The output is brought out on theterminals. Built in a nicely Polished boxwith on/off switch jewel light etc.AccessoriesSodium Lamp & TXFR : Complete with 35 Watt TXFR & woodencase.Ceramic Crystal : The Crystal is provided with the handle.Tank : Optically true glass tank is provided forkeeping the Liquid.Liquid : Kerosene Oil is provided in a plasticbottle
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Fourier Analysis Kit

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Fourier Analysis Kit
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Approx. Rs 28,500 / Piece(s)Get Latest Price

To verify the existence of different harmonics and measure their relative amplitudes in complex wave (square, clipped sine wave, triangular wave etc.)

Theory: A kit has been designed to analyze any complex wave (square, clipped sine wave triangular wave etc.). It enables one to verify the existence of different harmonics and measure their relative amplitudes. Typical results obtained with the kit are shown below:
             
Fourier Analysis Kit consists of the following parts:

Function generator.
Analyzer.
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Verdet's Constant Appratus Farradays Effect

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Verdet's Constant Appratus Farradays Effect
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Approx. Rs 48,500 / Piece(s)Get Latest Price

Principle and Working :
If a transparent isotropic material is placed in a strong magnetic field and linearly polarized light is transmitted in the direction of the magnetic field, of polarization of linearly polarized light rotates by an angle. In the present setup the optical activity of flint glass is investigated in a magnetic field. The angle of rotation of plane polarized light is proportional to the length (L) and magnetic field (B).
Ø=V.L.B
Where, V-Verdet’s constant
The magnetic field is measured using Gauss meter with axial probe.

Exp-1 Observing the rotation of the polarization plane when polarized monochromatic light passes through flint glass under influence of a magnetic field.
Exp-2 Determining Verdet's constant from the relation between rotation angle and magnetic flux.
Exp-3 Verification of the relationship between Verdet's constant and wavelength.


Additional Information:

  • Item Code: BTC-1589
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Ultrasonic Waves Velocity In A Liquid Medium

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Ultrasonic Waves Velocity In A Liquid Medium
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Approx. Rs 21,500 / Piece(s)Get Latest Price

Ultrasonic Diffraction Appratus ( Complete setup)

Apparatus : R.F. oscillator, piezo electric crystal, spectrometer (ultrasonic), glass cell, light source (sodium lamp)
Ultrasonic diffraction apparatus (Model No: BTC-7) is used to study diffraction of light by ultrasonic waves. Ultrasonic sound refers to sound pressure with a frequency greater than the human audible range (20Hz to 20 KHz). When an ultrasonic wave propagates through a medium, the molecules in that medium vibrate over very short distance in a direction parallel to the longitudinal wave. The apparatus consists of a graduated long rail and rail carriages appropriately fitted with laser head, an RF oscillator and a detector with translation stage. The ultrasonic diffraction setup uses laser as light source. As the laser beam is intense and monochromatic, we get clear higher order diffraction patten

Experiment Examples
To find the velocity of ultrasonic wave in liquids.
To find the bulk modulus of the given liquid.
To find the compressibility of the liquid.

The ultrasonic waves generated by the transducer travels down the medium (liquid) and gets reflected at the bottom (flat glass plate) of the cell. The incident and reflected waves interfere and a stationery / standing wave pattern is formed. The laser head is mounted using akinematic holder. This helps to direct the laser beam through the liquid and then onto the detector conveniently. The diffraction pattern is scanned using a translation stage with freedom in X axis. The velocity of ultrasonic waves in liquids can be calculated from this experiment
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Digital RF Oscillator

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Digital RF Oscillator
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Approx. Rs 7,500 / eachGet Latest Price

Btc has specially designed the RF Oscillator with Digital for ultrasonic experiments
Technical Specs for the instruments

Variable 100 KHz to 30 MHz. The instrument is to deliver modulated output and continuous wave form. The frequency range is covered in eight bands , modulation frequency is 400 Hz, and also available on output terminals. M Modulation depth 30% Accuracy ±2%
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Curie Temperature Kit

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Curie Temperature Kit
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Approx. Rs 33,500 / PieceGet Latest Price

Objective: Determination of dielectric constant of PZT material with Temperature variation and thus determining Curie Temperature.

Theory: Ferro-electricity usually disappears above a certain temperature called the transition (or Curie) temperature. Knowledge of the Curie temperature and the variation of the dielectric constant below and above the Curie temperature are of interest to the physicists and the engineers.

In this experiment an LC circuit is used to determine the capacitance of the dielectric cell and hence the dielectric constant. The circuit details are shown below:

 

DC : Dielectric Cell

SC : Standard Capacitor

L : Induction

X : Ferroelectric Sample

 

The dielectric cell DC is placed in PID controlled hot air furnace. The temperature of the furnace can be measured by inserting a thermocouple in a hole (provided on one of the Teflon discs), so that it touches one of the capacitor (metal) plates.

The audio oscillator is incorporated inside the instrument. If CSC and CDC represent the capacitances of the standard capacitor and dielectric cell respectively and if VC1 and VC are the voltages across SC and DC then

 


By measuring VSC & VDC and using the value of CSC we can determine the capacitance of the dielectric cell containing the sample.

If C0 represents the capacitance of the dielectric cell without the crystal and the plates separated by air gap whose thickness is the same as the thickness of the crystal then C0 is given by

 

 

where r represents the radius of the crystal and d represents its thickness

The dielectric constant of the crystal at any given temp. is given by

 


The Setup facilitates determination of dielectric constant of PZT sample at different temperature. Dielectric Constant increases as temperature increases, and near Curie temperature, it shows a steep increase and reaches a peak at Curie Temperature.

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E/M Zeeman's Effect Apparatus

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E/M Zeeman's Effect Apparatus
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Approx. Rs 1.45 Lakh / eachGet Latest Price

Zeeman effect is an optomagnetic device in which a source of line spectrum prefavourly monochromatic source is placed between the poles of electromagnet. On applying the suitable magnetic field, the spectral line splits into sub components which have wavelength different from its main / original wavelength. The apparatus should have:

· Constant deviation spectrograph

· Calibration of drum: 400 nm to 700 nm

· Least count of calibration: 1 nm

· Constant deviation prism made of optical glass having refractive
index – 1.71

· Electromagnet should have field strength 10 KG at a gap of 10 mm

Between its poles

· Pole pieces dia.: 50 mm; length: 200 mm

· One end of pole pieces is tapered (tapered dia. 25 mm)

· Other end is threaded and provided with a mechanism to move pole
pieces back & forth to vary the gap between them

· Digital and stabilized power supply (30 volt; 10 amp) for above
electromagnet.

· Neon discharge tube of suitable capillary thickness

· Wooden stand for holding the above discharge tube

· High voltage transformer (Range: 1-4.5 KV) to run the above
discharge tube.

· Digital gauss meter (Range: 2-20 KG)

· Is required to measure the applied magnetic field

· A micrometer eyepiece (measuring range: 0-15 mm) should have least
count 0.01 mm

· Fabry-Perot etalon (clear aperture 25 mm) should be provided with
level screw


Additional Information:

  • Item Code: BTC-1564
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